Sentence examples for had been here from inspiring English sources

"had been here" is a correct and commonly used phrase in written English.
It is used when speaking about something that happened in the past and was completed before another past event. Example: "I couldn't find my keys when I arrived at the party, but I later realized that I had left them at home when I had been here earlier." In this sentence, "had been here" is used to show that the action of being at the party (in the past) happened before the action of forgetting the keys (also in the past).